/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.druid.query.operator.window;

import com.fasterxml.jackson.annotation.JsonCreator;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.google.common.base.Preconditions;
import org.apache.druid.query.operator.Operator;
import org.apache.druid.query.operator.OperatorFactory;
import org.apache.druid.query.operator.WindowProcessorOperator;

public class WindowOperatorFactory implements OperatorFactory
{
  private Processor processor;

  @JsonCreator
  public WindowOperatorFactory(
      @JsonProperty("processor") Processor processor
  )
  {
    Preconditions.checkNotNull(processor, "processor cannot be null");
    this.processor = processor;
  }

  @JsonProperty("processor")
  public Processor getProcessor()
  {
    return processor;
  }

  @Override
  public Operator wrap(Operator op)
  {
    return new WindowProcessorOperator(processor, op);
  }

  @Override
  public boolean validateEquivalent(OperatorFactory other)
  {
    if (other instanceof WindowOperatorFactory) {
      return processor.validateEquivalent(((WindowOperatorFactory) other).getProcessor());
    }
    return false;
  }

  @Override
  public String toString()
  {
    return "WindowOperatorFactory{" +
           "processor=" + processor +
           '}';
  }
}
